Hydraulically actuated apparatus

ABSTRACT

A device combining a die which is split longitudinally into a plurality of parts and a ram for pressing a coupling or fitting on a hose or the like into the die to swage the coupling on the hose. Means are provided for sequentially hydraulically (1) moving the ram towards the die while simultaneously moving the die component parts together to form a die cavity, (2) for pressing a hose and coupling assembly into the die cavity and thereby swage the coupling on the hose, and (3) for lifting the ram from the swaged product while separating the die parts to release the product therefrom.

United States Patent Whitledge 1 1 Dec. 19, 1972 [541 HYDRAULICALLY ACTUATED 3,048,212 8/1962 Morrison ..29/ 237 APPARATUS 3,348,292 10/1967 Turner etal 3,411,410 111968 W b l 121 X [72] Inventor: Jon Keyes Whitledge, Mantua, Ohio I est my et a 9 7 [73] A i S l Moore & Company, Mam Primary Examiner-Charles W. Lanham ma, Ohio Assistant Examiner-Gene P. Crosby F] a D 1 1970 AttorneyClelle W. Upchurch 1e ec. 211 Appl. No.: 103,187 [571 ABSTRACT A device combining a die which is split longitudinally [52] use. 29/237 72/453- into a plurality of parts and a ram for pressing a [51] Int Cl 1325p 19" coupling or fitting on a hose or the like into the die to [58] Field of Search 2.}; l t'gi' M5, 453, swage the coupling on the hose. Means are provided for sequentially hydraulically (1) moving the ram towards the die while simultaneously moving the die component parts together to form a die cavity, (2) for pressing a hose and coupling assembly into the die cavity and thereby swage the coupling on the hose, and (3) for lifting the ram from the swaged product while separating the die parts to release the product therefrom.

9 Claims, 7 Drawing Figures I PATENTEUBEB 1 9 912 V 3. 706. 123

SHEET 1 UF 3 IN YEN TOR Ja/v K W/l/ n 5065 HYDRAULICALLY ACTUATED APPARATUS This invention relates generally to an apparatus for swaging couplings or the like to the end of a hose, wire, cable or the like, and more particularly to a hydraulically actuated swaging device.

A hand actuated device adapted to swage a coupling on the end of a hose is disclosed in US. Pat. No. 3,048,2l2. This device has a ram slidably mounted on guide pins which can be moved downwardly by hand with a handle to exert pressure against a coupling and force it'into a die cavity. Such a device satisfactorily swages a-coupling on the end of a hose. However, it has the obvious disadvantage of being hand operated. Furthermore, it is often difficult to remove the swage product from the die cavity.

It is therefore an object of this invention to provide a hydraulically actuated apparatus for pressing an assembly of parts in a die. Another object of the invention is to provide a hydraulicallyactuated swaging apparatus adapted to perform a sequence of cycles with only one power source and only one hydraulic cylinder. Still another object of the invention is to provide a swaging apparatus having a die composed of a plurality of parts and adapted to separate the die parts after swaging to release the swaged product. A further object of the invention is to provide ahydraulically actuated swaging device having a die which is split longitudinally into a plurality of parts which will automatically assemble the parts to form a die cavity, seat the resulting assembled die parts in a support therefor, swage the product, remove the die from the support and separate the swaged product from the die.

Other objects will become apparent from the following description with reference to the accompanying drawing in which:

FIGS. 1 and 2 are side and front elevations, respectively, partially cutaway, of one embodiment of the invention in position for beginning its swaging cycle;

FIG. 3 is a front elevation of the embodiment of FIG. 1 illustrating the relative positions of its parts after the first cycle of operation;

FIG. 4 is a front elevation of the embodiment of FIG. 1 illustrating the relative positions of its parts after the second cycle of its operation;

FIG. 5 is a front elevation of the embodiment of FIG. 1 illustrating the relative positions of its parts after the third cycle of its operation;

welded or otherwise secured to a die supporting base 14. The lower ends of support members and 10a are beveled inwardly preferably at an angle of about from perpendicular. Base 14 has a longitudinally extending bore or aperture 55 having an inner wall which tapers inwardly substantially parallel with the beveled lower ends of support members 10 and 10a.

A piston cylinder 15 composed of a cylindrical housing with ends 60 and 61 is disposed between support members 10 and 10a. In cylinder 15, a first piston rod 17 has a first piston 16 mounted on its lower threaded end and secured thereto by nut 18. Piston rod 17 passes through an opening in top 60 of cylinder 15 and is secured to top cross-bar 11 against longitudinal movement with a socket head cap screw. A seal is provided in opening 60 about piston rod 17 to retain liquid under pressure in cylinder 15. Cylinder 15 is free to move longitudinally over piston rod 17 Annular spaces 72 and 73 between bosses 70 and 71 and the cylindrical housing insure that ports 27 and 29 are not blocked when boss 70 and 71 bottom out against a piston.

A second piston rod 21 has an upper threaded end with a second piston 20 secured thereto by nut 22. The lower end of piston rod 21 extends through a sealed opening in the bottom 61 of cylinder 15 which permits piston cylinder 15 to move longitudinally with respect to the piston rod 21. The lower end of piston rod 21 is fastened to an intermediate cross-member 25 with a has a boss 19 which fits into an opening in the-under- FIG. 6 is a cross-section taken along the line 6-6 of FIG. 4; and

FIG. 7 is an enlarged, fragmentary, longitudinal section of the die and supporting frame in their positions illustrated in FIG. 2.

The apparatus provided by this invention is adapted to install any swage-on type coupling or fitting to any type of hose, wire or cable, including, wire braid hose, plastic hose, rubber hose and composite hose having a core and sheath of rubber or plastic such as nylon and an intermediate layer of fibrous reinforcing material, insulated wire or cable and the like.

Referring to the drawing and particularly to FIGS. 1 and 2, a frame is composed of a pair of horizontally spaced, vertically extending rods or support members 10 and 10a having their threaded ends extending through bores in top cross-bar l1 and secured thereto by means of nuts 12 and 13 and having their lower ends side of cross-bar 25 immediately below the end of piston rod 21. Spring plunger 26 extends into a notch in boss 19 to secure pusher 23 to cross-bar 25.

A first port 27 is positioned on the cylindrical housing of cylinder 15 between piston 16 and top 60. A second port 28 is positioned on the cylindrical housing of cylinder is below piston 16 and above the uppermost position of piston 20. A third port 29 is positioned on the cylindrical housing of cylinder 15 below second piston 20 and above bottom 61. A T-type fitting 30 lies between a port 27 and a first high pressure hose 31 which leads to a hydraulic valve 62 which in turn is connected to pump 32 which withdraws liquid from reservoir 33. Port 28 is provided with a suitable fitting and is connected through a second high pressure hose 34 to valve 62. Port 29 is connected through a suitable fitting and a third high pressure hose 35 to T-fitting 30. The internal diameters of hose 35 and of fittings 35a are sufficiently less than the opening through port 27 to require a greater pressure for passage of liquid therethrough than is required for liquid to flow through the opening of port 27.

A pair of horizontally spaced lift bars 36 and 36a are spaced outwardly from and extend longitudinally alongside of support members 10 and 10a respectively. The upper ends of lift bars 36 and 36a are pivotally attached with nuts and bolts to brackets 37 and 38 respectively which are welded or otherwise firmly secured to the housing of cylinder 15. The lower ends of lift bars 36 and 36a are bent inwardly to a position substantially parallel to the beveled lower ends of support members 10 and 10a. The length of the inwardly bent portions 54 and 54a of lift bars 36 and 36a may vary with the length of the stroke of piston rod 21. In an apparatus in which cylinder moves downwardly about 2 inches, about 3% inches of the lower ends of lift bars 36 and 36a may be bent inwardly. Brackets39 and 40 are bolted at one end to lift bars 36 and 36a adjacent the bent portions thereof. Die support frames 41 and 42 are welded to the other ends of brackets 39 and 40. Die frame 41 has a plurality of peripherally spaced fixed pins 43 and one detent pin 44. Mounting frame 42 has similarly peripherally spaced fixed pins 45 and detent pin 46. Die halves 47 and 47aare' provided with peripherally spaced holes 48 and 48a near the upper edge thereof which are adapted to receive pins 43, 44, 45 and 46.

A valve handle 52 is moved to a position forward from neutral to set valve 62 so that it will direct liquid from pump 32 and reservoir 33 through hose 34 and port 28 into cylinder 15 and direct displaced liquid passing from cylinder 15 through port 27 and hose 31 to reservoir 33. Valve handle 52 is moved to a position rearward to direct passage of 1 liquid under pressure through hose 31 into cylinder 15.and from cylinder 15 v through port 28 and hose 34 to reservoir 33.

A bracket 49 is welded or otherwise firmly secured at one end to cross-bar 25 and projects outwardly beyond lift bar 36a. A lift rod 50 is attached at its lower end to a latch handle 51 and passes through a hole drilled near the end of bracket 49. Latch handle 51 holds valve handle 52in its rearward position until the volume of liquid below piston is sufficient to raise piston 20, piston rod 21 and cross-bar to the point where bracket 49 engages collar 53 which is vertically adjustable on rod 50 to permit adjustment of the length of the stroke. Then, as collar 53 continues to move upwardly, latch handle 51 is lifted by rod 50 and .becomes disengaged from valve handle 52 permitting it to move back to a neutral position and close valve 62. r

The swaging device may be supported by any suitable means such as by a jig or it may be mounted on a bench. Die base 14 should extend outwardly from the edge of the bench top in order that lift bars 36 and 36a and die halves 47 and 47a may move to positions below die base 14. Support 65 for reservoir 33 can be conveniently made of angle iron and drilled to provide for bolting support 65 of reservoir 33, pump 32 and the motor 74 to the surface of a bench. When support 65 lies against the horizontal surface of the bench, the longitudinal axis of the upright portion of the apparatus is tilted backwards.

In operating the device with cylinder 15 and piston rod 21 in FIGS. 1 and 2, a hose end 57 is inserted between stem or insert 57' and ferrule 59 of a coupling and the assembly is pushed through cavity 58 of the die until the threaded end 63 of the coupling is inserted in the cavity of pusher 23 as shown in FIGS. 2 and 7. Valve handle 52 is moved to its forward position. This opens the valve for passage of liquid under pressure from pump 32 through hose 34 and port 28 into cylinder 15 between pistons 16 and 20 and for the displacement of liquid through port 27 and hose 31 back to reservoir 33. As the volume of liquid between pistons 16 and 20 increases, cylinder 15 moves longitudinally from cross-bar 11 until it bottoms on piston 16. Since the passage of liquid through port 29 requires a greater pressure than passage of liquid through port 27,

liquid will be displaced from above piston 16 as cylinder between piston 20 and piston cylinder bottom 61 remains substantially constant. Consequently, piston cylinder 15, piston rod 21, lift bars 36 and 36a, crossbar 25 and pusher 23 move longitudinally as aunit to the position illustrated in FIG. 3.

As the bent ends54 and 54a of lift bars 36 and 36a move below base 14 they are guided inwardly by ad justable guide members 56 and 56a permitting the lower portions of lift bars 36 and 36a to move to a position parallel with support members 10 and 10a as illustrated in FIG. 3. As lift bars 36 and 36a move inwardly, frames 41 and 42 and die halves 47 and 47a are moved together to the position shownin FIG. 3.

After piston cylinder 15 has reached the position illustrated in FIG. 3 with boss of cap 60 resting on piston 16, continued pumping of liquid through port 28 moves piston 20 longitudinally with respect'to cylinder 15 forcing liquid out through port 29. Piston rod,21, cross-bar 25 and pusher 23 are moved downwardly until the assembly of hose end 57 and a fitting composed of insert 57, shell 59 and threaded end 63 is seated in die cavity 58 and'pressed'to compress the hose end 57 between the shell or ferrule 59 and insert 57 of the fitting as shown in FIGS. 4 and 6.

Valve handle 52 is now moved manually'to its position rearward where it is held by latch handle 51. At this position of valve handle 52, liquid is pumped through hose 31 and because there is less resistance to fluid flow through port 27 than through hose 35 and fittings 35a, the liquid passes into cylinder 15 through port 27. Port 28 is opened when the valve handle 52 is positioned rearwards so liquid may flow from between pistons 16 and 20 back to reservoir 33 through hose 34. As the volume of liquid above piston 16 increasesand the volume of liquid between pistons 16 and 20 decreases, cylinder 15 moves upwardly until it bottoms 7 against cross-bar 11. During this movement the distance between piston 20 and base 61 of cylinder 15 and the volume of liquid therebetween remains constant.'Consequently, cylinder 15, piston rod 21, crossbar 25 and pusher 23 move upwardly as'a unit with piston rod 21 remaining in its extended position below base 61 as shown in FIG. 5. Lift bars 36 and 36a are lifted and forced outwardly as shown in FIG. 5 because the bent ends are adjacent the beveled end of support members 10 and 10a. Since the pressure required to pump liquid through port 27 after the top of cylinder 15 rests against cross-bar 11 is greater than the pressure required to pump liquid through hose 35 and port 29, continued pumping of liquid is through port 29 and into cylinder 15 below piston 20. As the volume of liquid increases below piston 20, liquid is displaced from between the pistons 16 and 20 through port 28 back to reservoir 33 and piston 20 moves towards piston 16.

As explained hereinbefore, when movement of piston rod 21 causes bracket 49 to strike collar 53, latch handle 51 becomes disengaged from valve handle 52 permitting it to return to its spring loaded neutral position and divert liquid flow through valve 62, to reservoir 33. The device is now again positioned as illustrated in FIGS. 1 and 2.

15 moves longitudinally. The distance As lift bars 36 and 36a are lifted by cylinder when liquid is pumped through port 27 above-piston'l6, the bent ends are guided by the tapered surfaces of support members 10 and 10a and guide members 56 and 56a. This forces lift bars 36 and 36a apart into the position shown in FIGS. 2 and 5 and moves die. frames 41 and 42 apart. As illustrated best in FIG. 7, die halves 47 and 47a become separated and are forcibly pulled from the swaged coupling which is held against lateral movement by the cavity in pusher 23. This eliminates striking the coupling with a hammer or similar tool to remove it from the die cavity as is frequently required with the prior art hand actuated device. I

Various other means for restricting-flow of liquid through port 29 only at pressures greater than the pressure required for liquid flow through port 27 may be provided. For example, a needle valve or'its equivalent may be installed between the liquid supply means and port 29 to adjust fluid flow. Likewise, the length of hose 35 may be increased to increase the resistance to passage of liquid therethrough. However, the most advantageous method of obtaining sequencing of cycles is to select a hose 35 and fittings 35a of less diameter than the opening in port 27 or to use a hose 35 of sufficient length to offer more resistance to fluid flow than port 27.

Any suitable hydraulic fluid may be used such as glycerine, oil or one of the commercially available hydraulic fluids. The pressure differential between ports 27 and 29 will be dependent upon the viscosity of the fluid. The greater the viscosity of the fluid, the greater the restriction or resistance to fluid passage through port 29 required to provide a proper pressure differential between ports 27 and 29. in most emboditent pins 44 and 45 in remaining holes in the die segments. Pushers 23 may .be provided with various sizes of cavities to accommodate different sizes of fittings and quickly interchanged from one to the other by removing spring plunger 26 from the notch in the boss of the pusher. I

While the apparatus provided by the invention has been found particularly advantageous for installing fittings on hose and tubing and is described primarily herein with respect thereto, it can be used for installing fittings on cables, wires and various other articles and its use for such installations is contemplated Although the invention has been described in detail I for the purpose of illustration, it is to'be understood ments, it is preferred to operate at pressures of about 1,500 pounds per square inch gage. It is preferred that the pressure required for passage of liquid through port 29 be about 90 to 100 p.s.i. gage greater than the pressure for unobstructed liquid flow through port 27.

As indicated hereinbefore, the openings 60 and 61 through the walls of piston cylinder 15 must be sealed to prevent the loss of liquid about piston rods 17 and 21. Any conventional pressure seal may be used. A rubber O-ring mounted in a suitable spring retainer clip may be inserted in the opening for this purpose.

Any suitable conventional hydraulic valve adapted to direct fluid in and out of the cylinder as described above may be used. The four-way valve described and illustrated on page 251 of Oil Hydraulic Power by Walter Ernst, Second edition, published by McGraw Hill Book Company (1960) may be used. Hydraulic valves sold by Dukes Company Incorporated Schiller Park, Illinois as Series DV-020 and Series DV-03O control valves have been found to be particularly advantageous.

In the embodiment described above, the lower ends of -support members 10 and ll la,.the lower ends of lift bars 36 and 36a and the inner wall of die receiving aperture 55 in die base 14 are all parallel with each other and slope inwardly at an angle of about 15 from perpendicular. The angle can be greater or less than 7 15 depending upon the distance desired between the two die halves for insertion of the parts to be swaged and for removal of the swaged product therefrom.

that modifications can be made therein by those skilled in the art without departing from the spirit andscope thereof except as it may be limited by the claims.

. The embodiments of the invention in which an exclusive property or privilege is claimed are defined as follows:

1. In a device having a die longitudinally split into segments, a support for the die and a ram for pressing an article to be shaped into a cavity in the die, means for sequentially hydraulically (1) moving the ram towards the die support while simultaneously actuating the die segments to form a die having a cavity therein and (2) pressing the article in the die cavity and shaping it to the configuration of the die cavity, and (3) hydraulically actuated means for lifting the ram from the shaped product while separating the die segments to release the resulting product from the die cavity.

2. The device of claim 1 wherein said die is divided longitudinally into two substantially symmetrical halves, one half mounted on one supporting frame and the second half mounted on a second supporting frame, means for moving the frames toward each other until the die halves meet to form a die having a die cavity as the ram moves toward the resulting die, and means for moving the die halves outwardly from each other as the ram moves away from the die after swaging.

3. In an apparatus comprising means for moving a piston rod sequentially first in one direction and then in the opposite direction, the combination comprising a dinal movement, a second piston in the cylinder having a piston rod attached thereto and free to move longitudinally under pressure, means for introducing liquid under pressure into the cylinder between said pistons while simultaneously preferentially displacing liquid from between the first piston and said first end whereby the cylinder moves towards the first piston until it bottoms thereon, means for introducing liquid under pressure into the cylinder between the two pistons while the cylinder is bottomed on the first piston and for the simultaneous displacement of liquid from between the second piston and second end of the cylinder whereby the second piston moves towards the second end of the cylinder, means for introducing liquid into the cylinder above the firstpiston and for simultaneous displacement of liquid from that portion of the cylinder between the two pistons whereby the first end of the cylinder moves away from the first piston, means for limiting the distance the first end of the cylinder can move from the first piston, and means for introducing liquid into the cylinder between the second piston and second end of the cylinder and for simultaneous displacement of liquid from the cylinder from between the two pistons with movement of towards the first piston.

the second piston 5 4. A device comprising a. a frame having a pair of transversely spaced longitudinally extending support members each secured atone end to a top cross-bar and at the opposite end to a die base having a cavity therein adapted to support a die;

an intermediate cross-bar slidably mounted: on

said support members and spaced longitudinally between the top cross-bar and base;

c. a pair of lift bars, one spaced transversely outwardly from each support member and extending longitudinally alongside it with one end thereof between the two cross-bars;

. a cylinder having a cylindrical housing, a top and bottom disposed between the support members and between the two cross-bars; means for securing said cylinder to said lift bars; longitudinally spaced first and second pistons in said cylinder, a first piston rod attached at one end to said first piston and slidably extending through an opening in the top of the cylinder; said opening being sealed against loss of liquid under pressure; the first piston rod being attached at its other end to the top cross-bar; a second piston rod attached at one end to the second piston and extending outwardly through an opening in the base of the cylinder; said opening being sealed against loss of liquid under pressure; the second piston rod being attached at its opposite end to the upper side of the intermediate cross-bar;

e. a pusher assembly affixed to the underside of the intermediate cross-bar and slidable therewith; said pusher having a cavity in the base thereof adapted to receive a fitting to be installed on the open end of a hose or the like;

f. a die lifting frame mounted on each lift bar disposed above the base; a pair of die halves adapted to fit together to provide a die cavity of 55 the configuration to be imparted to a swaged coupling; means for securing one of the die halves in each frame in face to face relationship;

g. means for directing the movement of the lift bars towards each other as they move longitudinally beyond the die base;

. means for introducing a liquid under pressure into the cylinder between the first and second pistons and for the simultaneous passage of liquid from above the first piston out of the cylinder whereby the cylinder moves to'a position where its top bottoms on the first piston and the cylinder, lift bars,

intermediate cross-bar and pusher move as a unit toward the die base bringing the die halves together and seating them in the cavity of the die base;

i. means for continuing to introduce a liquid under pressure into the cylinder between the first and second pistons while the top of the cylinder is bottomed on the first piston and for simultaneous passage of liquid from the cylinder below the second piston with longitudinal movement of the second piston rod, intermediate cross-bar and pusher to an extended position, outside the cylinder;

j. means for introducing fluid under pressure into the cylinder above the firstpiston and for simultaneous passageof liquid from between the first and second pistons and out of the cylinder whereby the cylinder moves longitudinally until its top is adjacent the top cross-bar and carries with it the intermediate cross-bar and pusher still in their extended position; and

k. means for introducing liquid under pressure into the cylinder below the second piston and simultaneous passage of liquid out of the cylinder between the first and second pistons with longitudinal movement of the second piston towards the first piston and accompanying retraction of the piston rod, intermediate cross-bar arid'pusher and separation of thedie halves.

5. The device of claim 4 wherein the cylindrical housing has three longitudinally spaced ports through which liquid under pressure enters the cylinder, a first port positioned on the housing above the first piston and connected through a first hose and a valve to a pump and reservoir containing liquid, a second port positioned on the housing between the two pistons and connected through a second hose to the valve, pump and reservoir containing liquid, a third port positioned on the housing below the second piston and connected to one end of a third hose, the other end of the third hose being connected to the first hose, and means whereby the pressure required for passage of liquid through the third port is greater than the pressure required for passage of liquid through the first port.

6. The device of claim 5 wherein the internal diameter of the third hose is less than the internal diameter of the first port.

7. The device of claim 5 wherein said valve has a valve handle adapted to be set in a first position to direct flow of liquid through the second hose towards the cylinder and from the first port through the first hose to the reservoir and in a second position to direct liquid from the reservoir through the first hose and from the second port to the reservoir.

8. The device of claim 7 having a means for holding the valve handle in said second position only until the upward stroke of the second piston moves the intermediate cross-bar to a predetermined point comprising, a bracket attached at one end to said intermediate cross-bar and projecting transversely therefrom with its opposite end beyond the adjacent lift bar, a bore through the bracket, a latch handle pivotally secured at one end and extending transversely across the valve handle, a rod passing slidably through the bore of the bracket and attached at one, end to the latch handle ad- 

1. In a device having a die longitudinally split into segments, a support for the die and a ram for pressing an article to be shaped into a cavity in the die, means for sequentially hydraulically (1) moving the ram towards the die support while simultaneously actuating the die segments to form a die having a cavity therein and (2) pressing the article in the die cavity and shaping it to the configuration of the die cavity, and (3) hydraulically actuated means for lifting the ram from the shaped product while separating the die segments to release the resulting product from the die cavity.
 2. The device of claim 1 wherein said die is divided longitudinally into two substantially symmetrical halves, one half mounted on one supporting frame and the second half mounted on a second supporting frame, means for moving the frames toward each other until the die halves meet to form a die having a die cavity as the ram moves toward the resulting die, and means for moving the die halves outwardly from each other as the ram moves away from the die after swaging.
 3. In an apparatus comprising means for moving a piston rod sequentially first in one direction and then in the opposite direction, the combination comprising a cylindrical housing and ends forming a hydraulic cylinder slidably mounted on a support therefor, a first piston in the cylinder having an attached first piston rod extending through a first end of the cylinder, said first piston rod being fixedly secured against longitudinal movement, a second piston in the cylinder having a piston rod attached thereto and free to move longitudinally under pressure, means for introducing liquid under pressure into the cylinder between said pistons while simultaneously preferentially displacing liquid from between the first piston and said first end whereby the cylinder moves towards the first piston until it bottoms thereon, means for introducing liquid under pressure into the cylinder between the two pistons while the cylinder is bottomed on the first piston and for the simultaneous displacement of liquid from between the second piston and second end of the cylinder whereby the second piston moves towards the second end of the cylinder, means for introducing liquid into the cylinder above the first piston and for simultaneous displacement of liquid from that portion of the cylinder between the two pistons whereby the first end of the cylinder moves away from the first piston, means for limiting the distance the first end of the cylinder can move from the first piston, and means for introducing liquid into the cylinder between the second piston and second end of the cylinder and for simultaneous displacement of liquid from the cylinder from between the two pistons with movement of the second piston towards the first piston.
 4. A device comprising a. a frame having a pair of transversely spaced longitudinally extending support members each secured at one end to a top cross-bar and at the opposite end to a die base having a cavity therein adapted to support a die; b. an intermediate cross-bar slidably mounted on said support members and spaced longitudinally between the top cross-bar and base; c. a pair of lift bars, one spaced transversely outwardly from each support member and extending longitudinally alongside it with one end thereof between the two cross-bars; d. a cylinder having a cylindrical housing, a top and bottom disposed between the support members and between the two cross-bars; means for securing said cylinder to said lift bars; longitudinally spaced first and second pistons in said cylinder, a first piston rod attached at one end to said first piston and slidably extending through an opening in the top of the cylinder; said opening being sealed against loss of liquid under pressure; the first piston rod being attached at its other end to the top cross-bar; a second piston rod attached at one end to the second piston and extending outwardly through an opening in the base of the cylinder; said opening being sealed against loss of liquid under pressure; the second piston rod being attached at its opposite end to the upper side of the intermediate cross-bar; e. a pusher assembly affIxed to the underside of the intermediate cross-bar and slidable therewith; said pusher having a cavity in the base thereof adapted to receive a fitting to be installed on the open end of a hose or the like; f. a die lifting frame mounted on each lift bar disposed above the base; a pair of die halves adapted to fit together to provide a die cavity of the configuration to be imparted to a swaged coupling; means for securing one of the die halves in each frame in face to face relationship; g. means for directing the movement of the lift bars towards each other as they move longitudinally beyond the die base; h. means for introducing a liquid under pressure into the cylinder between the first and second pistons and for the simultaneous passage of liquid from above the first piston out of the cylinder whereby the cylinder moves to a position where its top bottoms on the first piston and the cylinder, lift bars, intermediate cross-bar and pusher move as a unit toward the die base bringing the die halves together and seating them in the cavity of the die base; i. means for continuing to introduce a liquid under pressure into the cylinder between the first and second pistons while the top of the cylinder is bottomed on the first piston and for simultaneous passage of liquid from the cylinder below the second piston with longitudinal movement of the second piston rod, intermediate cross-bar and pusher to an extended position, outside the cylinder; j. means for introducing fluid under pressure into the cylinder above the first piston and for simultaneous passage of liquid from between the first and second pistons and out of the cylinder whereby the cylinder moves longitudinally until its top is adjacent the top cross-bar and carries with it the intermediate cross-bar and pusher still in their extended position; and k. means for introducing liquid under pressure into the cylinder below the second piston and simultaneous passage of liquid out of the cylinder between the first and second pistons with longitudinal movement of the second piston towards the first piston and accompanying retraction of the piston rod, intermediate cross-bar and pusher and separation of the die halves.
 5. The device of claim 4 wherein the cylindrical housing has three longitudinally spaced ports through which liquid under pressure enters the cylinder, a first port positioned on the housing above the first piston and connected through a first hose and a valve to a pump and reservoir containing liquid, a second port positioned on the housing between the two pistons and connected through a second hose to the valve, pump and reservoir containing liquid, a third port positioned on the housing below the second piston and connected to one end of a third hose, the other end of the third hose being connected to the first hose, and means whereby the pressure required for passage of liquid through the third port is greater than the pressure required for passage of liquid through the first port.
 6. The device of claim 5 wherein the internal diameter of the third hose is less than the internal diameter of the first port.
 7. The device of claim 5 wherein said valve has a valve handle adapted to be set in a first position to direct flow of liquid through the second hose towards the cylinder and from the first port through the first hose to the reservoir and in a second position to direct liquid from the reservoir through the first hose and from the second port to the reservoir.
 8. The device of claim 7 having a means for holding the valve handle in said second position only until the upward stroke of the second piston moves the intermediate cross-bar to a predetermined point comprising, a bracket attached at one end to said intermediate cross-bar and projecting transversely therefrom with its opposite end beyond the adjacent lift bar, a bore through the bracket, a latch handle pivotally secured at one end and extending transversely across the valve handle, a rod passing slidably thRough the bore of the bracket and attached at one end to the latch handle adjacent the valve handle, and a collar on said rod adapted to stop vertical movement of the bracket and to lift the latch handle from the valve handle.
 9. The device of claim 4 comprising a means for stopping the introduction of liquid into the cylinder below the second piston and for thereby positioning the two pistons in longitudinally spaced relationship. 